29122281 has 32 divisors (see below), whose sum is σ = 44997120. Its totient is φ = 18600192.

The previous prime is 29122277. The next prime is 29122319. The reversal of 29122281 is 18222192.

It is not a de Polignac number, because 29122281 - 2² = 29122277 is a prime.

It is a super-2 number, since 2×29122281² = 1696214501285922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (29122211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67041 + ... + 67473.

It is an arithmetic number, because the mean of its divisors is an integer number (1406160).

Almost surely, 2^29122281 is an apocalyptic number.

It is an amenable number.

29122281 is a deficient number, since it is larger than the sum of its proper divisors (15874839).

29122281 is a wasteful number, since it uses less digits than its factorization.

29122281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 536 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 29122281 is about 5396.5063698656. The cubic root of 29122281 is about 307.6629000052.

It can be divided in two parts, 29122 and 281, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 29122281 in words is "twenty-nine million, one hundred twenty-two thousand, two hundred eighty-one".